/* USER CODE BEGIN Header */
/**
  ******************************************************************************
  * @file           : main.c
  * @brief          : Main program body
  ******************************************************************************
  * @attention
  *
  * Copyright (c) 2025 STMicroelectronics.
  * All rights reserved.
  *
  * This software is licensed under terms that can be found in the LICENSE file
  * in the root directory of this software component.
  * If no LICENSE file comes with this software, it is provided AS-IS.
  *
  ******************************************************************************
  */
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "adc.h"
#include "dma.h"
#include "usart.h"
#include "gpio.h"

/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include <stdio.h>
#include <string.h>
/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */
uint16_t adc_value = 0; // 改为16位
float voltage = 0.0f;
char uart_buffer[150];
uint16_t adc_samples[100]; // 存储ADC采样数据，改为16位
uint32_t sample_count = 0; // 采样计数

// ADC相关变量
uint16_t adc_buffer[100]; // 用于存储ADC采样值的缓冲区
volatile uint8_t adc_conversion_complete = 0; // DMA转换完成标志
/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */

/* USER CODE END PFP */

/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**
  * @brief  The application entry point.
  * @retval int
  */
int main(void)
{

  /* USER CODE BEGIN 1 */

  /* USER CODE END 1 */

  /* MCU Configuration--------------------------------------------------------*/

  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
  HAL_Init();

  /* USER CODE BEGIN Init */

  /* USER CODE END Init */

  /* Configure the system clock */
  SystemClock_Config();

  /* USER CODE BEGIN SysInit */

  /* USER CODE END SysInit */

  /* Initialize all configured peripherals */
  MX_GPIO_Init();
  MX_DMA_Init();
  MX_ADC1_Init();
  MX_USART1_UART_Init();
  /* USER CODE BEGIN 2 */
  // ADC校准
  HAL_ADCEx_Calibration_Start(&hadc1);
  
  // 启动ADC DMA传输
  HAL_ADC_Start_DMA(&hadc1, (uint32_t*)adc_buffer, 100);
  
  // 发送启动消息
  sprintf(uart_buffer, "=== ADC DMA Demo Started ===\r\n");
  HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
  sprintf(uart_buffer, "ADC Channel: PA0 (ADC1_IN0)\r\n");
  HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
  sprintf(uart_buffer, "DMA Mode: Continuous Sampling\r\n");
  HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
  sprintf(uart_buffer, "Buffer Size: 100 samples\r\n");
  HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
  sprintf(uart_buffer, "UART Baud Rate: 115200\r\n");
  HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
  sprintf(uart_buffer, "================================\r\n\r\n");
  HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
  /* USER CODE END 2 */

  /* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
    /* USER CODE END WHILE */

    /* USER CODE BEGIN 3 */
    // 检查DMA传输是否完成
    if (adc_conversion_complete)
    {
      // 重置标志
      adc_conversion_complete = 0;
      
      // 计算ADC值的平均值
      uint32_t sum = 0;
      for (int i = 0; i < 100; i++)
      {
        sum += adc_buffer[i];
      }
      adc_value = sum / 100; // 计算平均值
      
      // 计算电压值 (假设参考电压为3.3V，12位ADC)
      voltage = (float)adc_value * 3.3f / 4095.0f;
      
      // 格式化输出字符串
      sprintf(uart_buffer, "ADC Avg: %lu | Voltage: %.2fV | Hex: 0x%lX\r\n", 
              adc_value, voltage, adc_value);
      
      // 通过串口发送
      HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
      
      // 显示部分原始数据
      sprintf(uart_buffer, "Raw Data (first 10): ");
      HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
      
      for (int i = 0; i < 10; i++)
      {
        sprintf(uart_buffer, "%lu ", adc_buffer[i]);
        HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
      }
      sprintf(uart_buffer, "\r\n");
      HAL_UART_Transmit(&huart1, (uint8_t*)uart_buffer, strlen(uart_buffer), 1000);
      
      // 延时1秒
      HAL_Delay(100);
    }
    else
    {
      // 等待DMA传输完成
      HAL_Delay(10);
    }
  }
  /* USER CODE END 3 */
}

/**
  * @brief System Clock Configuration
  * @retval None
  */
void SystemClock_Config(void)
{
  RCC_OscInitTypeDef RCC_OscInitStruct = {0};
  RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};

  /** Initializes the RCC Oscillators according to the specified parameters
  * in the RCC_OscInitTypeDef structure.
  */
  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
  RCC_OscInitStruct.HSEState = RCC_HSE_ON;
  RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
  RCC_OscInitStruct.HSIState = RCC_HSI_ON;
  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
  RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
  RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
  if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
  {
    Error_Handler();
  }

  /** Initializes the CPU, AHB and APB buses clocks
  */
  RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
                              |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
  RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
  RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
  RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
  RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

  if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
  {
    Error_Handler();
  }
  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC;
  PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
  {
    Error_Handler();
  }
}

/* USER CODE BEGIN 4 */

// DMA转换完成回调函数
void HAL_ADC_ConvCpltCallback(ADC_HandleTypeDef* hadc)
{
  if(hadc->Instance == ADC1)
  {
    adc_conversion_complete = 1;
  }
}

// DMA错误回调函数
void HAL_ADC_ErrorCallback(ADC_HandleTypeDef* hadc)
{
  if(hadc->Instance == ADC1)
  {
    // 处理ADC错误
    adc_conversion_complete = 0;
  }
}

/* USER CODE END 4 */

/**
  * @brief  This function is executed in case of error occurrence.
  * @retval None
  */
void Error_Handler(void)
{
  /* USER CODE BEGIN Error_Handler_Debug */
  /* User can add his own implementation to report the HAL error return state */
  __disable_irq();
  while (1)
  {
  }
  /* USER CODE END Error_Handler_Debug */
}

#ifdef  USE_FULL_ASSERT
/**
  * @brief  Reports the name of the source file and the source line number
  *         where the assert_param error has occurred.
  * @param  file: pointer to the source file name
  * @param  line: assert_param error line source number
  * @retval None
  */
void assert_failed(uint8_t *file, uint32_t line)
{
  /* USER CODE BEGIN 6 */
  /* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
  /* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
